Compressor-valve.



N. Af GHRISTBNSEN. COMPRESSOR VALVE. A APPLIUATIOIIILBD 1:53.21, 1904.

914,6999 Patented Mar.. 9, 1909.

l/ am Ne sa NIELs A. oHnisTnNsnN, or MiLwAuKEn wisconsin.

lo oMrREs'so 1a-VALVE'. I

Specification of Letters'Patentl PatentedMarch 9, 1909.l

To all whom it may concern.'V Y

Be it known that I, N rELs A. Cnnrsrnn- SEN, a citizen of the UnitedStates, residing at Milwaukee, in the county of Milwaukee and State ofWisconsin,- have inventedccn' tain new 'and useful Im rovements inCompressor-Valves, of Whic the following is a specification, referencebeing had to the accor'i aiiying drawing, forming a part thereof.

signedto operate on air-vorel-astic iiuids and space as much aspossible, particularly when high ressu'res are to be produced andmaintam The main objects ofv theinvention arey to l reduce the clearancespace; to make the sucthus avoidingthe necessity of making.,and

tion- 'and discharge valves interchangeable,

keeping in stock or at hand, different kinds of valves for useWhenneeded, and revent 4nag 'mereces ofthef clearance space y accidental .interchangeor misplacement of the 5 valves; to make-.the valvessensitive or ref.

'sportsive to slight variationsfin pressure and prompt action; andgenerally to improve the-constructionand operation of valves of thisclass.

`The invention consists in the novelconstruction-fand arrangement ofparts hereinaf ter' particularly described and pointed out in lin-theaccompanying drawin -lil'ie' letters j designate the same parts in botfigures. f

Figure 1 is a vertical section of a cylinder head to AWhich my improved'valves are api valves andA valve chambers axially yirai-aaa@a by the une2 2, Figi .45-

lied in a. plane indicated by the'line 1-1,l

.` chambers; which ii'the'v present instance are show-n as formed sideby side in the head' c of a`v compressor. Thesechambers are open attheir upperends', and at their. .lower ends valve'seats are formed orprovided around1 ports, one of which on the suction sidecornrnui'iicates with the air inlet or" supply pascaged', and the otheron the dischargev side' j s invention relates more particularl tocompressors which have automatic valves actuated by changes inpress'ure,and are de ypressor cylinderV and va Wirt-hi ylndef P0A e, Openingdirectly into 'the compressor cynnder. Just above the valve seat thesuction valve chamber com.

municates directly through a port f with the compressor` cylinder, andjust above its seat the discharge valve' chamber communicates with adischarge passage g. The valve channbe'rs are closed by caps or covers7i bolted or otherwise secured to the cylinder hea-d. These caps areformed or provided with lugs or extensions t', which correspond inslhape with and project downwardly into and near y nfill the valvechambers within a short fl-is-l m which 1t is desirable -tozreduce theclearance tance of the valve seats. y y are seamless cup-shaped valvespreferably made of cold drawn steel, o en at their .upper ends andclosedat their oWer ends,

which are litted'to the valve seats and con# stitu'te the working facesof the valves. They extend upwardly into and work freely in the spa-cesbetweenthe plugs i and the Walls of t e valve cham-bers which are ofcorresponding sha -by'sai vWalls orby both. The distance'be- -tween thelower ends of the plu ls and; the 4valve' seats, determines the lift o'tlief valves, their upwardA movement being arrested by the lower ends ofthe plugs .insteadf of'by the thin upper edges of the valves themselvesstriking against the caps h. s there* is a tendencyof carbonto collectupon and adhereto thel outside but not the inside of both suction anddischarge valves, greater .clearance space is preferably left outside ofthe valves, as shown in Fig'. 1', so that they will Work perfectly freeand'l at the sarn'e time be guided and held in place by the-plugsi,ulpon which they may have' acomparatively coset. 4

lt will be understood that the plug, when' used, Will serve' to guidethvalve, but if the plug be omittedz the walls of the' valve charn`-ber/will bev sufficiently 'closevv to the' v'alve to'rg'uide' iteffectively with the plug' omitted. o enable the changes inv pressure,which are constantly taking l ve chambers when the compressor Visfin'operation tobeinstantly communicated to the air in the spaces' between'the' closed ends of theV valves'- andthe' lower ends df the plugs'i,and: to' revent au' confined saidjs'pac'es freinA inte erlg thefre/separation of theva-lves'-, the valves f are perforated just aboveltheir seats a series of holes-lc. Free cominuincatien'isthus e, beingguided either by said plugs,

`00 place in the coinestablished between the air outside and the y airinside of the valves, and variations in the ressure outside areinstantly followed by' ike variations in the pressure inside of thevalves, so that they are always free to operate.

The holes 7c are so located that they will be closed or artially closedby the plugs fi when the va ves are opened and the closed ends oi thevalves will thus be cushioned and revented from striking forciblyagainst the ower ends of the (plugs. v v The valves y' an preferably thecaps h with the plugs fi, are'made alike, so that if they areaccidentally interchanged or misplaced the clearance Will not beincreased and the operation of the compressor will' not be affected.'The plug i may however be omitted on the discharge side withoutincreasing the clearance space or'aiiecting the .operation of thecompressor, ii care is taken to keep the parts in their proper places.On the suction side, where the valve chamber'is in constantcommunication with the compressor cylinder, the plug't,nearly iillingsaid chamber, reduces the clearance s ace to a minimum, just enoughbeing allowe for the necessary move# ment of y the valve. The valvechambers arranged as shown in the drawing are brought close to the end.of vthe working stroke of the piston and the contents of the 4passagesconnectingV them with the cylinder are thus reducedto a minimum; springsare dispensed with, and the valves are easily reached for inspection andrepairs. p

Itwill be observed that free communication is established between thesupply passage d and the suction port f by way of a passage through thesuctionvalve chamber, and that free-communication is also establishedbetween the cylinder port e and discharge g by way of a passa e throughthe discharge valve chamber, t e vpassage through each valve chamberbein independent of the clearance space in eac chamber, that is, the

passageisother than or aside from the clearance space above or outsideoi the limits of such passage although such passage may be 1n-communication with the clearance s ace..

Constructed as herein shown an described, valves controlling ports oflarge area are madeextremely light and sensitive.

Various changes in minor details of con`4 from the principle andintended scope oi the'/ 2. The combination with a suction valve chamber,of a cup-shaped valve therein, said .chamberbeing rovided with a portabove the .valve-seat or communication with the compressor cylinder, thewalls of the valve chamber bein suciently close to the valve toguide ite ectively, and a passage provided for the passage of iiuid independentof the clearance space inwhich the vvalve Works, substantiallyfis-described. 3. In a compressor, the' combination with -a valvechamber, of a vcup-shaped valve therein,l said chamber being providedwith a ort in its wall above the valve-seat and be owthe top of thevalve, the walls of the l"ialve chamber bein suiiciently close to thevalve to guide' it e 'ective'lyQand a assage providedtor the passage ofiiuid in ependent of the clearance space in which the valve works,substantially as described.

4*.'The combination of a valve-chamber,`

wa s of the valvechamber being in close proximity to the cup-shapedvalve vand Athe plug on which it is guided to reduce clear` ance space,and a passage provided .for the passage of i'luid independent of theclearance space in which the valve works, substantially v las described.

5. In a compressor, the combination of a valve chamber, va cover havinga plug rojecting into vsaid chamber Within a sliiort distance 'of thevalve-seat and iilling said chamber in cross section with the exceptionof a working clearance for a valve, and a cupshaped. suction valve,loosely iltting at Vits open end into the clearance space between` saidplug and the wallof the valve chamber,

said chamber being provided with a cylinders.

port above the valve-seat, substantially as n' described.

6. AIn a compressor, the combination of a valve chamber, a lug chamberwithin a s ort seat, and a cup-shaped valve extending' at its open endinto the annular space surrounding said plug and perforated adjacent toits `wor king face, said vlave chamberhaving a port in its wall 'abovethe valve seat, the wallsof the valve chamber being inI close proximityto the cup-shaped valve 'and the plug on which it is guided to reduceclearance space, anda passage provided for the passage lprojecting intosaid of. fluid independent of the clearance space works, substantiallyasv 'in which the valve described.

7. In a compressor, the combination of suction and discharge valvechambers, 'a

- plug projecting into' the suction valve 'cham-` istance of the valve-'ris ber Within a short distance of the valve scat and iilling saidchamber in cross section with the exception of a Working clearance for avlave, and interchangeable ou' -shaped suction and discharge valves, eacadapted .to Work at its open endtin the space between said plug and thewall of the suction valve v chamber, which has aport in its Wall abovethe valve seat, substantially as described.

8. In a compressor, the combination of suction and discharge valvechambers having interchangeable covers provided with plugs each of Whichis ada ted to project into the suction valve cham er Within a shortdistance 'of the vlave seat and to Vfill said chamber With the exceptionof a Working clearance space for a valve, and interchangeable cup-shaped suction and" discharge valves, each adapted to Work in theclearance space between either of -said plugs and the Wall of thesuction valve chamber, sub# stantially as described.

-9. In a compressor, the combination of suction and dischargevalve-chambers, a

plug projecting into the suction valve cham# 25 er within a shortdistance of the valve seat and filling said chamber in cross sectionwith the-exception of a Working clearance space for a valve, andinterchangeable cup-shaped suction and discharge valves, each adapted 30to Work in thev clearance space between said plug'and thel surroundingwall of the suction valve-chamber and perforated adjacent to its Workingface, substantially as described.

In Witness Whereof,1 hereto alix my sig- 35 nature in presence of twowitnesses.

NIELS A. 'CHRISTENSEN Witnesses:

E. C. H. BoTnUNl CHAs. L. Goss.

